Ventilated chimney-top



(No Model.)

. J. P SPIVEY VENTILATED CHIMNEY TOP.

,309. Patented Mar. 27, 1 894.:

INVENTOR,

UNITE STATES JOHN F. SPIVEY, OF FAIRVIEW, WEST VIRGINIA.

V 'VENTILATED CHIMNEY=TOP.

SPECIFICATION forming part of Letters Patent No. 517,309, dated March 2'7, 1894.

- Application filed September 16,1893. Serial No. 485,719. ea model.)

To all whom it may concern.-

Be it known that I, JOHNF. SPIVEY, a citizen of the United States, residing at Fairview, in the county of Hancock and State of West Virginia, have invented a new and useful Improvement in Ventilated Chimney-Tops,

which improvement is fully set forth in the following specification and accompanying drawlngs.

Figure '1 is a side elevation, in perspective, of my improved ventilating chimney top. Fig. 2 is a central vertical section. Fig. 3 is a transverse section on line a; a: of Fig. 1, and Fig. 4, a detail View of the wind deflector.

My invention relates to improvements in ventilated chimney tops and its object is to provide a simple, durable and reliable device adapted to secure a constant draft and insure the entire discharge of smoke, soot and all products of combustion under all conditions of the atmosphere or other adverse influences. It is well known that in certain localities, counter currents of air prevail at all times. In other places, the tops of chimneys are below the plane of adjacent buildings or elevations of ground in the immediate vicinity, which cause downward blasts of wind. The upward exit of smoke and soot being thus counteracted they necessarily find vent below and invade the interior of buildings.

The construction'and peculiar features of my invention will be understood by reference to the accompanying drawings in which A designates the lower section, B the intermediate and O thecrown or top section, all of which may be made of terra cotta or other preferred material. The interior wall of the lower section is provided at regularintervals with ventilating flues 2, the lower ends of which have lateral openings 8 forming a communication with the exterior of the smoke flue A, while their upper ends open directly into the interior of the flue. The upper portion of the said. flue is contracted in size and forms a ledge or windguard 4. Outwardly extending brackets 5, provided with notches 6 receive the interlocking lips 7 and unite the two sections. It will be seen that a series of curved sectional slots are thus formed between the overhanging shell of section B and the tapering upper end of section A. The upper end of section B is provided with brackets 8 which support the conical topped wind:deflector 9 having downwardly inclined openings 10.

The operation of my improved device will be readily understood. It may be here mentioned that in addition to the various unfavorable influences hereinbefore mentioned, it is generally conceded that the most difficult obstacle to contend with in securing a perfeet and constant chimney draft is caused by high winds which are accompanied by fitful downward puffs and eddies which cannot be successfully counteracted by any of the devices heretofore employed for the purpose.

Experiments with my invention have demonstrated the fact that when the wind blows in any direction, an exhaust current is formed on the opposite or lee side of the chimney. It therefore follows that if a current of air should enter the openings 3 on the windward side it will be exposed to the heat in the ventilating flues and as it passes upwardly into the smoke flue will be drawn toward the center thereof. It at the same time a downward blast should enter the top of the chimney its force will be first weakened by the deflector and the wind-guard. It will then meet the currents from below with the result that they will be mutually deflected and pass downwardly and escape through the openings on the lee side as indicated by the darts. It will be observed that if rain, snow or hail should enter the chimney, they will be diverted in the same manner and cannot pass directly into the chimney but will be arrested by the wind-guard 4: or escape through guard or ledge at the upper extremity of the smoke flue, the chamber B overhanging the have hereunto set my hand, this 26th day of smoke flue, the ventilating slots between the August, 1893, in the presence of witnesses. said chamber and smoke flue and the conical topped deflector supported above the JOHN SPIVEX' 5 chamber all arranged as and for the purpose Witnesses:

herein set forth. 0. G. MGKELVY,

' In testimony that I claim the foregoing I ROBERT B; MCNEIL. 

